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| author | Qipan Li <Qipan.Li@csr.com> | 2013-08-25 20:18:40 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-27 16:25:44 -0700 |
| commit | 459f15c45eee9136c3ceb7d9c1f88d5f2f225689 (patch) | |
| tree | 0f3c0517ec348f2b59af699ec20fc67a0ae3b732 /drivers/tty | |
| parent | 4f03ffcd3e8a8860c9adc153f03bf2ed7d428f2b (diff) | |
| download | linux-459f15c45eee9136c3ceb7d9c1f88d5f2f225689.tar.gz linux-459f15c45eee9136c3ceb7d9c1f88d5f2f225689.tar.bz2 linux-459f15c45eee9136c3ceb7d9c1f88d5f2f225689.zip | |
serial: sirf: define macro for some magic numbers of USP
this patch clears some magic numbers for offset and bitshift
of USP registers.
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/sirfsoc_uart.c | 37 | ||||
| -rw-r--r-- | drivers/tty/serial/sirfsoc_uart.h | 15 |
2 files changed, 37 insertions, 15 deletions
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index 96304cdc4745..aaa3ce22b5b8 100644 --- a/drivers/tty/serial/sirfsoc_uart.c +++ b/drivers/tty/serial/sirfsoc_uart.c @@ -951,11 +951,11 @@ static void sirfsoc_uart_set_termios(struct uart_port *port, set_baud = ((ioclk_rate / (clk_div_reg+1) - 1) / (sample_div_reg + 1)); /* setting usp mode 2 */ - len_val = ((1 << 0) | (1 << 8)); - len_val |= ((clk_div_reg & 0x3ff) << 21); - wr_regl(port, ureg->sirfsoc_mode2, - len_val); - + len_val = ((1 << SIRFSOC_USP_MODE2_RXD_DELAY_OFFSET) | + (1 << SIRFSOC_USP_MODE2_TXD_DELAY_OFFSET)); + len_val |= ((clk_div_reg & SIRFSOC_USP_MODE2_CLK_DIVISOR_MASK) + << SIRFSOC_USP_MODE2_CLK_DIVISOR_OFFSET); + wr_regl(port, ureg->sirfsoc_mode2, len_val); } if (tty_termios_baud_rate(termios)) tty_termios_encode_baud_rate(termios, set_baud, set_baud); @@ -963,7 +963,7 @@ static void sirfsoc_uart_set_termios(struct uart_port *port, rx_time_out = SIRFSOC_UART_RX_TIMEOUT(set_baud, 20000); rx_time_out = SIRFUART_RECV_TIMEOUT_VALUE(rx_time_out); txfifo_op_reg = rd_regl(port, ureg->sirfsoc_tx_fifo_op); - wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0); + wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_STOP); wr_regl(port, ureg->sirfsoc_tx_fifo_op, (txfifo_op_reg & ~SIRFUART_FIFO_START)); if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) { @@ -971,21 +971,28 @@ static void sirfsoc_uart_set_termios(struct uart_port *port, wr_regl(port, ureg->sirfsoc_line_ctrl, config_reg); } else { /*tx frame ctrl*/ - len_val = (data_bit_len - 1) << 0; - len_val |= (data_bit_len + 1 + stop_bit_len - 1) << 16; - len_val |= ((data_bit_len - 1) << 24); - len_val |= (((clk_div_reg & 0xc00) >> 10) << 30); + len_val = (data_bit_len - 1) << SIRFSOC_USP_TX_DATA_LEN_OFFSET; + len_val |= (data_bit_len + 1 + stop_bit_len - 1) << + SIRFSOC_USP_TX_FRAME_LEN_OFFSET; + len_val |= ((data_bit_len - 1) << + SIRFSOC_USP_TX_SHIFTER_LEN_OFFSET); + len_val |= (((clk_div_reg & 0xc00) >> 10) << + SIRFSOC_USP_TX_CLK_DIVISOR_OFFSET); wr_regl(port, ureg->sirfsoc_tx_frame_ctrl, len_val); /*rx frame ctrl*/ - len_val = (data_bit_len - 1) << 0; - len_val |= (data_bit_len + 1 + stop_bit_len - 1) << 8; - len_val |= (data_bit_len - 1) << 16; - len_val |= (((clk_div_reg & 0xf000) >> 12) << 24); + len_val = (data_bit_len - 1) << SIRFSOC_USP_RX_DATA_LEN_OFFSET; + len_val |= (data_bit_len + 1 + stop_bit_len - 1) << + SIRFSOC_USP_RX_FRAME_LEN_OFFSET; + len_val |= (data_bit_len - 1) << + SIRFSOC_USP_RX_SHIFTER_LEN_OFFSET; + len_val |= (((clk_div_reg & 0xf000) >> 12) << + SIRFSOC_USP_RX_CLK_DIVISOR_OFFSET); wr_regl(port, ureg->sirfsoc_rx_frame_ctrl, len_val); /*async param*/ wr_regl(port, ureg->sirfsoc_async_param_reg, (SIRFUART_RECV_TIMEOUT(port, rx_time_out)) | - (sample_div_reg & 0x3f) << 16); + (sample_div_reg & SIRFSOC_USP_ASYNC_DIV2_MASK) << + SIRFSOC_USP_ASYNC_DIV2_OFFSET); } if (IS_DMA_CHAN_VALID(sirfport->tx_dma_no)) wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl, SIRFUART_DMA_MODE); diff --git a/drivers/tty/serial/sirfsoc_uart.h b/drivers/tty/serial/sirfsoc_uart.h index 173e00f84c67..c43333dfab4a 100644 --- a/drivers/tty/serial/sirfsoc_uart.h +++ b/drivers/tty/serial/sirfsoc_uart.h @@ -311,6 +311,21 @@ struct sirfsoc_uart_register sirfsoc_uart = { /* USP SPEC */ #define SIRFSOC_USP_ENDIAN_CTRL_LSBF BIT(4) #define SIRFSOC_USP_EN BIT(5) +#define SIRFSOC_USP_MODE2_RXD_DELAY_OFFSET 0 +#define SIRFSOC_USP_MODE2_TXD_DELAY_OFFSET 8 +#define SIRFSOC_USP_MODE2_CLK_DIVISOR_MASK 0x3ff +#define SIRFSOC_USP_MODE2_CLK_DIVISOR_OFFSET 21 +#define SIRFSOC_USP_TX_DATA_LEN_OFFSET 0 +#define SIRFSOC_USP_TX_SYNC_LEN_OFFSET 8 +#define SIRFSOC_USP_TX_FRAME_LEN_OFFSET 16 +#define SIRFSOC_USP_TX_SHIFTER_LEN_OFFSET 24 +#define SIRFSOC_USP_TX_CLK_DIVISOR_OFFSET 30 +#define SIRFSOC_USP_RX_DATA_LEN_OFFSET 0 +#define SIRFSOC_USP_RX_FRAME_LEN_OFFSET 8 +#define SIRFSOC_USP_RX_SHIFTER_LEN_OFFSET 16 +#define SIRFSOC_USP_RX_CLK_DIVISOR_OFFSET 24 +#define SIRFSOC_USP_ASYNC_DIV2_MASK 0x3f +#define SIRFSOC_USP_ASYNC_DIV2_OFFSET 16 /* USP-UART Common */ #define SIRFSOC_UART_RX_TIMEOUT(br, to) (((br) * (((to) + 999) / 1000)) / 1000) |